Apparatus for measuring speeds



Dec. 6 1927.

A. SEGUIN APPARATUS FORMEASURING SPEEDS Filed Aug. l5, 1922 INVENTOR;

Patented Dec. 13, 1927i.

'UNITED STATES vPMENT oFFlwcs AUGUSTIN SEGUIN, or PARIS, FRANCE.

" A'llhepresent invention hasfor itsrobject modifications in the drive-ofthe indicating pointer inthe apparatus constructed accordingto my prior U. Patent No. 1,424,384, in which the speed is indicated by the meeting point of an element rwhich rotates al-Y ways in a forward-direction and at a speed k which is Vconstantly proportionalto the one which is to be measured, withV an elementof comparison having an alternatingmotionand whose speedV during its backward stroke. is independent of the speed ,to beV measured.

In my prior Patent Athe element of Yconstantly forward rotation,

and in the direction of the increasing speeds, y only when the speed to be measured 1n- Fig. Zis a plan view ofthe same;

rectly backward, i. e., in the direction of the` decreasing speeds, by the element of comparison, and to be driven forward throughy a constant angle at'each revolution of the element of constantly forward rotation, by

a contact member connected with the latter.'

'I In the accompanying drawing illustrating by' way of example an embodimentof the apparatus according to the invention, e V

' lig.` 1 showsthe apparatus partly in sec f tion and partly in side view.

As shown .in Vthe drawing Avcomprises the platea, abridge piece V,which t is constituted by the two distance rods Z7y and the plate c.

The yaxle pin g carries a balance wheel 6 c ,provided with a spiral spring 7. one end tion of the' arrow (Fig. 2),v at aspeedpropor-` ,whereof isl secured atL .7 to the'screw dysaid axle pin isrpivoted on the one hand to the screwl but is eccentered 'with respect toY 'itheaxis of` said'screw, *andon the otherA hand to the screw d securedto thebridge piece 0. The wheel .4,.rotating on abearing plate 4',

Vis operatedby the pinion e and in the direc-y l tional to that which is vto berm'easu'red, and

f tliespring 7 tends todrive thegbalancewheel 7 6 in the oppositedirection. This wheel 4 carries a fixed studl3 whichfmay come into f .contact with a striker 5 mounted on'thsbalel No.V 1,424,384, the at. dicating pointer is driven directly either by Yiiidicating the Speed O vsp,erated,thejspeed of the latter being first Y APPARATUS FOR MEASURING SPEEDS.

i Application mea Augustk ,15,l 1922, sensi No. 582,085, and in rranAugiist 19, 1,921.

anc-e wheel. Due to the eccentricity of the circular path C of the strikerl 5 with reference tothe circular path C of the inner edge. of Vthestud 13, this contactisV impossibleein a determinedangle a of this rotation.

The-drawing shows the apparatus in the po` sition in Vwhich the stud 13 is ready to release the striker 5, i. e., a position near one of the intersecting points 'of the circlesA C and C. Vhen the stud 13 rotating forward according to' the arrow (llig.v 2)l encounters the striker driven backward byA the `balance wheel, the striker and the balance wheel are stopped and then are driven forward by the stud 13, until the latter slightly passes the position illustrated; Athe studl 13 still rof ltating forward, then releases 'the striker and thus the balance wheel, which startsback-V ward with the Vstriker until the latter is again encountered by the stud 13. Theposition for which the stud releases the striker is constant and well determinedby the distance between the axes of pin g and screw (l, and by the length of the striker. A screw d eccentered with respect to the screw d, maintainsby friction by means of theconvex steel disc la, a. disc against `a bearing plate,4 and the bridge piece c. The disc 8 constitutes the intermediatermem.-

gaged with'the strikers.` Y

' The wheel 4 carries a support 13 opposite the st-ud 13; the upper end of said support is providedwith a small spring strip 13" which, dueto the eccentricity between the *disc 8 andthe wheel r4 will contact with. the n f edge of said disc through a certain angle 0 the apparatus Y at each revolution of the wheel 4, and will pressfupon said edge lof the disc with a strength sufficient to l'drive the latter. The

disc 8 is thus rotated forward (direction of the arrow) through the angle o at each rev- ,olutionl of the wheel 4.

The indicating pointer 9 1s pivoted on the bridge 0 by friction by means of Va convex steel disc'lc held bya small bridge-piece'lc,

and carries a stud 9 Awhich enters a hold 9 ofwopening which is at least'equal to o.

,"llhe apparatus being at rest, the pointer if the wheel 4 is .ber and carries a linger t whichcaube en- 10ok 'Y yin the disc 8, said hole subtending an angle.

lil

`Wheel (i,

slow. the dise S driven forward through the angle o ne above desei'iliied; the striker :3 driven 'torivnril by the stud 13, is then released i'roui the lutter :inddriven buehu wurd by the spring T through the balance During this lnu'kunrd stroke" of the striker the lutter encounters the linger t und drives it beek together with the dise 8, until the 1trui 'l egreiu ineets the striker and drives it "Forward,` But the Speed oli' wheel 4t increasing, :it the next revolution of seid Wheel the stud liz iiieets the striker, rotating buelmiurd; bel-'ore the point at Wliiehsuid meeting uns previously effected and consequently during this second revolution, the linger t ,is not `driven backward by the striker :is fur :is (hiring the lirst rerolotion. lit will thus he' seen that since the decreases, the striker `5 will drive the dise through dise 8 is rotated` successively forvnrd e Constant angle o; :ind backward throiig'h' u deerensing engle. und this during the succ Nire rerolutiens oivl the Wheel l, the mean position of the dise iii moved grade ally linfuurcl. Then the speed ut which the wheel l is rotated hns reuehed its norn'iul value which is to be uieesurechi. e. reineins constant, the dise S ut e'auh. revolution oi the wheel l will he iuipelled forward through the corr-stunt :ingle 0 by the spring 3 und on the other hund ilnpelled through the suine :ingle in the opposite direction by the striker until this striker makes conteet with the stud l-l ut u fixed point 'for the speed new constant. `Tl`1us`, the dise 8 will swimr throuih :i eonstunt :infile 0 sterline' D vf i b on the speed to from u .iosition de Dendinw i I he measured. It' the speed to be measured S backward through n greater angle that when seid speed f 'fonstzint und until seid striker nonies fig-iin into enghgement with the stud 13. The dise Sthiis reaches a new `position of swing 0 depending on the `new speed.` It the speed increases, the spring 13 :it eeeh revolution of the `Wheel t will ilnpel the dise S forward through the" constent :ingle 0 but the striker will drive the dise 8 buekwnrd through :i smaller :ingle that when the speed is constant, und the dise `8 takes n new position of swing' o depending on the new speed.

The indicating pointer 9 Witlrthe` dise 8 through the intermediary o a pla)7 n, this pointerwill take av tired position for euch position of swing 0 of the dise 8 and hence 'tor erich value ofthe speed to be measured. Should this play be o',

greuterthun 0i. e. it theungle subtended by the hele 9 is greater than 05 :i dead :ingle 0-0, is thus provided, which determines the variation of speed necessary to obtain :i change of position ot the indicating pointer 9, which will afford the desired aperioil'ieit)T for the pointer. It should be noted that when driving enbeing Conneeted striker 5 is still Within the angle In order to prevent such unwinding of the spring' `T the eeeentrieity oit the two paths C sind `C :uid the length of the striker 5 muy be so determined that the angle a 1s very srnell.` In this n'mnuer, the devioe is operaitirez` within u hirge range of speeds dnd is only inoperative for ver slow speeds or very high epe In prec lee; this isnot n dre Wbnelt since ull ineusuring appratus" are constructed `tor normally determined limits of speeds.

It should be iuited that the spiral spring need' not he wound through niore thun one Complete ret'olution in order to properly operute. ln other Words,` the appuratus Will be soi'lesigned und f rulhruted that the speed will be eorrettlyindicated. when the idle lposition ot' the bnlnnoe wheel substantiallyc'oi`N responds to the position of the exis of the Strilcershoun it yein Fig. 2, the spirali spring 7 being then entirely" unwonnd. If, for sien1 speeds,` beneuth the lou'er limit ol speed oor respondingr to the ezipzieity ot' the uiii'iarzitiis, the stud 15j t the tiz'irel in the seetoi" ol :ingle n due to the buhinee wheel beiner urgedbeol; by its spring nnilliiy inertie beyond the position er, the :indication will he Wrong;r und Will remain :1o until the speed to heiineasured Willl have suilieiently increased to 'tell Within the ran'e of speeflsirhieh muy he measured `with the zippirntus.

lT An apparatus for measuring speeds Comprising :i driving 1nen1ber,` Ineens for constantly impnrtin` to said driving" inember a motion in e forward direction and at u speed proportional tothat to beineasured, u" l'mlance` Wheel eoeentered with respect to said drivingnielnber und adapted to be driven forward by the lutter zindto re-` leased therefrom by wey of-said eeeentrieity,` e spil-:il spring" urging said balance Wheel beekward,` :in intermediate member `adapted to be rotated forvnrd through `a constzint angle ntA euch revolutionof the driiing niemberzind to be Vrotated backward bysiiid bull# since Wheel and indicating means operutively Workin within lfnils to meet the striker 5, during` connected with seid intermediate irurliber` Award by the same, a coupling member carried by said driving member and adaptedrto drive said discv forward through a constant' angle at each revolution of the driving member and indicating means operatively connected with said disc with a predetermined play whereby the desired aperiodicity of the pointer is ensured.

3. An apparatus for measuring speeds comprising a driving member, means for constantly imparting to said driving member a motion in a forward direction and` at a speed proportional to that to be measured, a balance wheel eccentered with respect to said driving member, a striker mounted` on said balance wheel, a sp-iral spring urging said balance wheel backward, a studcarried by said driving member and adapted to contact with said striker for driving the same forward within a determined angle, a circular discv coaxial with said balance wheel, a pin carried by said disc and adapted to be encountered by said striker during the backward rotation of the latter, a coupling member carried by said driving member and adapted to drive said disc forward through 'aV con-y stant angle at each revolution of the driving member and indicating' means operatively connected with said 'disc with a predetermined play whereby the desired aperiodicity of the pointer is ensured. c

4. An apparatus for measuring speeds comprising a driving., member, means for constantly imparting to said driving member a motion ina forward direction and at a speed proportional to that to b e measured, a balance wheel eccentered with respect to said driving member and adapted to be driven forward by the latter and to be released therefrom by way of said eccentricity, a spiral spring urging said balance wheel backward, a circular disc coaxial with said balance wheel and adapted to be driven backward bythe same, a spring blade carried by said driving 'member and Vadapted to contact withthe edgejof said disc through a constant angle at each revolution of the driving mem'- ber and indicating means operatively connected with said disc with a predetermined play whereby the desired aperiodicity of the pointer is ensured.

5. An apparatus for Vmeasuring speeds comprising a driving member, means Vfor constantly imparting to said driving member a motion in a forward direction and at a speed proportional to `that to bemeasured, a balance wheel eccentered with respect to said driving member and adapted to be driven forward by the latter and to be released therefrom by way of said eccentricity, a. spiral spring urging said balance wheel backward,A a circular'disc coaxial with said balance wheel and adapted to be driven backward by the same, a coupling member carried by said driving member and adapted to drivesaid dise forward through a constant angle at each revolution of the driving member7 an opening in said disc having a predetermined diameter, a pointer and a stud carried by said pointer, and extending through said opening whereby the desired aperiodicity of f the pointer is ensured when said.`

AUGUSTIN SEGUIN. y' 

